Upper and Lower Bounds

What is the upper bound and lower bound of 62 kg, measured to the nearest kg?

The sides of an equilateral triangle are 9.4 cm, correct to the nearest millimetre.

Work out the upper bound of the perimeter of this triangle.

A metal pole is 500cm long, correct to the nearest centimetre. The pole is cut into rods each of length 5.8 cm, correct to the nearest millimetre.

Calculate the largest number of rods that the pole can be cut into.

One year ago Ahmed’s height was 114cm. Today his height is 120 cm. Both measurements are correct to the nearest centimetre.

Work out the upper bound for the increase in Ahmed’s height.

An equilateral triangle has sides of length 16.1cm, correct to the nearest millimetre.

Find the lower and upper bounds of the perimeter of the triangle.

The diagram shows a quadrilateral. The lengths of the sides are given to the nearest centimetre.

Calculate the upper bound of the perimeter of the quadrilateral.

The cost of making a chair is $28 correct to the nearest dollar.

Calculate the lower and upper bounds for the cost of making 450 chairs.

 The length, $l$ metres, of a football pitch is 96m, correct to the nearest metre.
Complete the statement about the length of this football pitch.

The sides of a rectangle are 6.3 cm and 4.8cm, each correct to 1 decimal place.

Calculate the upper bound for the area of the rectangle.

A fence is made from 32 identical pieces of wood, each of length 2 metres correct to the nearest centimetre.

Calculate the lower bound for the total length of the wood used to make this fence. Write down your full calculator display.